[Icom] IC-751 FM Unit Schematic wanted

Thu, 24 Jan 2002 21:50:43 -0800

Michael:

Thanks for the input, but I can tell you for sure that the 751 has a
separate board next to the main board on the upper deck.  The service manual
I have has a pictorial of the component placement (which clearly shows it as
a separate board) but no schematic.

Oh well, thanks, I'll keep looking.

Stuart
----- Original Message -----
From: <[email protected]>
To: <[email protected]>
Sent: Thursday, January 24, 2002 8:39 PM
Subject: Re: [Icom] IC-751 FM Unit Schematic wanted

| I don't think there is a separate board for FM for the IC-751.
| The radio comes equipped to receive FM (at least mine did
| when I bought it new).  I don't have a service manual for the IC-751,
| but I did get a manual for the IC-751A.  It shows the FM detector as
| an integral part of the radio, not like the IC-720 and some others
| where FM required an outboard plug-in board.
|
| If you look at Illustration 2-5 which is the Main Unit, you se the FM
| modulator circuit right in center left section right about the CW, RTTY
| oscillator section.  I don't think this is a separate board.
|
| On the right side, you see the FM IF, FM Detector circuit.  Again,
| it is an integrated part of the Main Unit and not a separate outboard
| item.
|
| Or perhaps I misunderstood your question.
|
| I hope this is helpful.
|
| Micheal Salem N5MS
|
|
|
|
| On Fri, 25 Jan 2002 00:23:58 -0000 "Michael P. Olbrisch"
| <[email protected]> writes:
| >
| >
| > > -----Original Message-----
| > > From: [email protected]
| > [mailto:[email protected]]On
| > > Behalf Of Stuart Rumley
| > > Sent: Thursday, January 24, 2002 3:11 PM
| > > To: [email protected]
| > > Subject: Re: [Icom] IC-751 FM Unit Schematic wanted
| > >
| > >
| > > Michael-
| > >
| > > Thanks for the offer to help.  I don't know what the model of
| > > the FM Unit is, its just a small internal board on the main deck.
| >
| > > I've looked through the service manual I have an cannot find
| > > any reference to the board part number or model number.
| > > What do you have?
| > >
| > > Stuart
| >
| > What I have is two units.  I have an IC-740 with the FM unit, and
| > I also have an IC-551D with an FM unit.  Both are back-up radios,
| > and they are stored away in a place difficult to get to.  If you can
| > tell me the unit number, like EX-306 of whatever, I can look it up
| > and see if that is what I have.  Dunno, you may also have the one
| > that goes in the IC-725.  I don't believe the 751 used the unit
| > for the IC-551, but it might be the one for the IC-740.  Let me
| > know.
| >
| > Mike.
| > ----
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